(DOCS-9122) Add partial (#18745)

terraform/README.md

@@ -33,9 +33,12 @@ The Datadog Terraform provider is available through the [Terraform Registry][1].
 
     **Note**: If you are not using the Datadog US1 site, you must set the `api_url` [optional parameter][7] with your [Datadog site][6]. Ensure the documentation site selector on the right of the page is set to your correct Datadog site, then use the following URL as the value of the `api_url` parameter:
 
+<!-- partial
     ```
     https://api.{{< region-param key="dd_site" code="true" >}}/
     ```
+partial -->
+
 4. Run `terraform init`. This initializes the directory for use with Terraform and pulls the Datadog provider.
 5. Create any `.tf` file in the `terraform_config/` directory and start creating Datadog resources.